Thank you Jmjanzen for your help. First i downloaded rootsh fine,, then I followed everything you said above and look what was the result: am I doing anything wrong ? ~ $ sudo gainroot Root shell enabled BusyBox v1.6.1 (2008-05-22 10:32:35 EEST) Built-in shell (ash) Enter 'help' for a list of built-in commands. /home/user # cd /usr/share/tutorial-applet/ /bin/sh: cd: can't cd to /usr/share/tutorial-applet/ /home/user # mv N800-tutorial.swf N800-tutorial.swf.old mv: cannot rename 'N800-tutorial.swf': No such file or directory /home/user # cp /media/mmc1/SuperMario.swf /usr/share/tutorial-applet/ cp: cannot stat '/media/mmc1/SuperMario.swf': No such file or directory /home/user # mv SuperMario.swf N800-tutorial.swf mv: cannot rename 'SuperMario.swf': No such file or directory /home/user # exit